The rules (page 14) say:
A trap can also be disarmed through specific actions to remove it from the board without suffering its negative effects.
I know of a single specific action to remove a trap which is the Thief's Knack ability of the Scoundrel character class. What are some others? (Jumping over a trap, stepping into a trap or pushing an enemy into a trap, are not specific actions to disarm a trap, so they do not count)